/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */
#ifndef __BLO_READFILE_H__
#define __BLO_READFILE_H__

/** \file BLO_readfile.h
 *  \ingroup blenloader
 *  \brief external readfile function prototypes.
 */

#ifdef __cplusplus
extern "C" {
#endif

struct bScreen;
struct direntry;
struct LinkNode;
struct Main;
struct MemFile;
struct ReportList;
struct Scene;
struct SpaceFile;
struct UserDef;
struct bContext;
struct BHead;
struct FileData;

typedef struct BlendHandle BlendHandle;

typedef enum BlenFileType {
	BLENFILETYPE_BLEND = 1,
	BLENFILETYPE_PUB = 2,
	BLENFILETYPE_RUNTIME = 3
} BlenFileType;

typedef struct BlendFileData {
	struct Main *main;
	struct UserDef *user;

	int winpos;
	int fileflags;
	int displaymode;
	int globalf;
	char filename[1024];    /* 1024 = FILE_MAX */
	
	struct bScreen *curscreen;
	struct Scene *curscene;
	
	BlenFileType type;
} BlendFileData;

/**
 * Open a blender file from a pathname. The function
 * returns NULL and sets a report in the list if
 * it cannot open the file.
 *
 * \param filepath The path of the file to open.
 * \param reports If the return value is NULL, errors
 * indicating the cause of the failure.
 * \return The data of the file.
 */
BlendFileData *BLO_read_from_file(
        const char *filepath,
        struct ReportList *reports);

/**
 * Open a blender file from memory. The function
 * returns NULL and sets a report in the list if
 * it cannot open the file.
 *
 * \param mem The file data.
 * \param memsize The length of \a mem.
 * \param reports If the return value is NULL, errors
 * indicating the cause of the failure.
 * \return The data of the file.
 */
BlendFileData *BLO_read_from_memory(
        const void *mem, int memsize,
        struct ReportList *reports);

/**
 * oldmain is old main, from which we will keep libraries, images, ..
 * file name is current file, only for retrieving library data */

BlendFileData *BLO_read_from_memfile(
        struct Main *oldmain, const char *filename, struct MemFile *memfile,
        struct ReportList *reports);

/**
 * Free's a BlendFileData structure and _all_ the
 * data associated with it (the userdef data, and
 * the main libblock data).
 *
 * \param bfd The structure to free.
 */
void
BLO_blendfiledata_free(BlendFileData *bfd);

/**
 * Open a blendhandle from a file path.
 *
 * \param file The file path to open.
 * \param reports Report errors in opening the file (can be NULL).
 * \return A handle on success, or NULL on failure.
 */
BlendHandle *BLO_blendhandle_from_file(
        const char *filepath,
        struct ReportList *reports);

/**
 * Open a blendhandle from memory.
 *
 * \param mem The data to load from.
 * \param memsize The size of the data.
 * \return A handle on success, or NULL on failure.
 */

BlendHandle *BLO_blendhandle_from_memory(
        const void *mem, int memsize);

/**
 * Gets the names of all the datablocks in a file
 * of a certain type (ie. All the scene names in
 * a file).
 *
 * \param bh The blendhandle to access.
 * \param ofblocktype The type of names to get.
 * \param tot_names The length of the returned list.
 * \return A BLI_linklist of strings. The string links
 * should be freed with malloc.
 */
struct LinkNode *BLO_blendhandle_get_datablock_names(
        BlendHandle *bh,
        int ofblocktype, int *tot_names);

/**
 * Gets the previews of all the datablocks in a file
 * of a certain type (ie. All the scene names in
 * a file).
 *
 * \param bh The blendhandle to access.
 * \param ofblocktype The type of names to get.
 * \param tot_prev The length of the returned list.
 * \return A BLI_linklist of PreviewImage. The PreviewImage links
 * should be freed with malloc.
 */
struct LinkNode *BLO_blendhandle_get_previews(
        BlendHandle *bh,
        int ofblocktype, int *tot_prev);

/**
 * Gets the names of all the datablock groups in a
 * file. (ie. file contains Scene, Mesh, and Lamp
 * datablocks).
 *
 * \param bh The blendhandle to access.
 * \return A BLI_linklist of strings. The string links
 * should be freed with malloc.
 */
struct LinkNode *BLO_blendhandle_get_linkable_groups(BlendHandle *bh);

/**
 * Close and free a blendhandle. The handle
 * becomes invalid after this call.
 *
 * \param bh The handle to close.
 */
void
BLO_blendhandle_close(BlendHandle *bh);

/***/

#define BLO_GROUP_MAX 32

bool BLO_has_bfile_extension(const char *str);

/**
 * return ok when a blenderfile, in dir is the filename,
 * in group the type of libdata
 */
bool BLO_is_a_library(const char *path, char *dir, char *group);


/**
 * Initialize the BlendHandle for appending or linking library data.
 *
 * \param mainvar The current main database eg G.main or CTX_data_main(C).
 * \param bh A blender file handle as returned by BLO_blendhandle_from_file or BLO_blendhandle_from_memory.
 * \param filepath Used for relative linking, copied to the lib->name
 * \return the library Main, to be passed to BLO_library_append_named_part as mainl.
 */
struct Main *BLO_library_append_begin(
        struct Main *mainvar, BlendHandle **bh,
        const char *filepath);


/**
 * Link/Append a named datablock from an external blend file.
 *
 * \param mainl The main database to link from (not the active one).
 * \param bh The blender file handle.
 * \param idname The name of the datablock (without the 2 char ID prefix)
 * \param idcode The kind of datablock to link.
 * \return the appended ID when found.
 */
struct ID *BLO_library_append_named_part(
        struct Main *mainl, BlendHandle **bh,
        const char *idname, const int idcode);

/**
 * Link/Append a named datablock from an external blend file.
 * optionally instance the object in the scene when the flags are set.
 *
 * \param C The context, when NULL instancing object in the scene isn't done.
 * \param mainl The main database to link from (not the active one).
 * \param bh The blender file handle.
 * \param idname The name of the datablock (without the 2 char ID prefix)
 * \param idcode The kind of datablock to link.
 * \param flag Options for linking, used for instancing.
 * \return the appended ID when found.
 */
struct ID *BLO_library_append_named_part_ex(
        const struct bContext *C, struct Main *mainl, BlendHandle **bh,
        const char *idname, const int idcode, const short flag);

void BLO_library_append_end(const struct bContext *C, struct Main *mainl, BlendHandle **bh, int idcode, short flag);

void BLO_library_append_all(struct Main *mainl, BlendHandle *bh);

void *BLO_library_read_struct(struct FileData *fd, struct BHead *bh, const char *blockname);

BlendFileData *blo_read_blendafterruntime(int file, const char *name, int actualsize, struct ReportList *reports);

/* internal function but we need to expose it */
void blo_lib_link_screen_restore(struct Main *newmain, struct bScreen *curscreen, struct Scene *curscene);

/**
 * BLO_expand_main() loops over all ID data in Main to mark relations.
 * Set (id->flag & LIB_NEED_EXPAND) to mark expanding. Flags get cleared after expanding.
 *
 * \param expand_doit_func() gets called for each ID block it finds
 */
void BLO_main_expander(void (*expand_doit_func)(void *, struct Main *, void *));

/**
 * BLO_expand_main() loops over all ID data in Main to mark relations.
 * Set (id->flag & LIB_NEED_EXPAND) to mark expanding. Flags get cleared after expanding.
 *
 * \param fdhandle usually filedata, or own handle
 * \param mainvar the Main database to expand
 */
void BLO_expand_main(void *fdhandle, struct Main *mainvar);

/* Update defaults in startup.blend & userprefs.blend, without having to save and embed it */
void BLO_update_defaults_userpref_blend(void);
void BLO_update_defaults_startup_blend(struct Main *mainvar);

#ifdef __cplusplus
} 
#endif

#endif  /* __BLO_READFILE_H__ */
